| English thesaurus | |||
| |||
| obbo; observ; obsv | |||
| obsn; obsr | |||
| The condition of weather and terrain that permits a force to see the friendly, enemy, and neutral personnel and systems, and key aspects of the environment. (FRA) | |||
|
observation : 7 phrases in 2 subjects |
| Mathematics | 5 |
| Statistics | 2 |